Ordering Recommendation

Acceptable initial test when antiphospholipid syndrome (APS) is strongly suspected. Order with Lupus Anticoagulant Reflex Panel (3017009) and Beta-2 Glycoprotein 1 Antibodies, IgG and IgM (0050321). Cardiolipin Antibodies, IgG and IgM (0099344) is preferred.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Serum separator tube.

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Plasma or other body fluids. Contaminated, heat-inactivated, hemolyzed, or lipemic specimens.

Remarks
Stability

After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year

Methodology

Semi-Quantitative Enzyme-Linked Immunosorbent Assay

Performed

Sun-Sat

Reported

1-2 days

Reference Interval

Test Number
Components
Reference Interval
  Cardiolipin Antibody IgG 14 GPL or less

Interpretive Data

The persistent presence of IgG and/or IgM cardiolipin (CL) antibodies in moderate or high levels (greater than 40 GPL and/or greater than 40 MPL units) is a laboratory criterion for the diagnosis of antiphospholipid syndrome (APS). Persistence is defined as moderate or high levels of IgG and/or IgM CL antibodies detected in two or more specimens drawn at least 12 weeks apart (J Throm Haemost. 2006;4:295-306). Lower positive levels of IgG and/or IgM CL antibodies (above cutoff but less than 40 GPL and/or less than 40 MPL units) may occur in patients with the clinical symptoms of APS; therefore, the actual significance of these levels is undefined. Results should not be used alone for diagnosis and must be interpreted in light of APS-specific clinical manifestations and/or other criteria phospholipid antibody tests.


Component
Interpretation
Cardiolipin Antibody, IgG 14 GPL or less                   Negative
15-19 GPL                         Indeterminate
20-80 GPL                         Low to Moderately Positive
81 GPL or greater             High Positive

Compliance Category

FDA

Note

GPL = IgG phospholipid units

Hotline History

N/A

CPT Codes

86147

Components

Component Test Code* Component Chart Name LOINC
0050901 Cardiolipin Antibody IgG 3181-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • ACA
  • aCL
  • aCL Antibody
  • aCL IgG
  • Anti-Cardiolipin
  • Anticardiolipin
  • Anticardiolipin Antibodies
  • Cardiolip
Cardiolipin Antibody, IgG